You're right to be careful. Let's break down the NEC definition and how it applies to your situation.

NEC 2017 Definition of a Bathroom (Article 100)

"A bathroom is an area including a basin with one or more of the following: a toilet, a urinal, a tub, a shower, a bidet, or similar plumbing fixtures."

Applying the Definition to Your Situation

You have a room with a toilet and a sink (basin). According to the NEC definition, this

IS considered a bathroom.

GFCI Requirements (NEC 210.8(A))

NEC 210.8(A) states that all 125-volt, 15- and 20-ampere receptacles installed in bathrooms shall be protected by a ground-fault circuit interrupter.

Conclusion

Yes, because you have a toilet and a sink (basin) in the same room, all 125V, 15A and 20A receptacles in your restroom

must be GFCI protected according to the NEC 2017. Flag for review